Numbers 6:24-26 in the King James Version reads:
24 The LORD bless thee, and keep thee: 25 The LORD make his face shine upon thee, and be gracious unto thee: 26 The LORD lift up his countenance upon thee, and give thee peace.
These three verses appear in Numbers 6 as the words the Lord tells Moses that Aaron and his sons are to use to bless the children of Israel. Read it in context at Numbers 6:24-26, or the full chapter at Numbers 6.